FGFS-4.1/OpenSceneGraph
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Added View::computeIntersections methods

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This commit is contained in:
Robert Osfield
2007-01-09 17:35:46 +00:00
parent 7626169283
commit 4d4b342e97
7 changed files with 139 additions and 112 deletions
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19
examples/osglauncher/osglauncher.cpp
View File

@@ -92,20 +92,18 @@ bool PickHandler::handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapte
std::string PickHandler::pick(float x, float y)
{
#if 0
osgUtil::IntersectVisitor::HitList hlist;
if (_viewer->computeIntersections(x, y, hlist))
osgUtil::LineSegmentIntersector::Intersections intersections;
if (_viewer->computeIntersections(x, y, intersections))
{
for(osgUtil::IntersectVisitor::HitList::iterator hitr=hlist.begin();
hitr!=hlist.end();
for(osgUtil::LineSegmentIntersector::Intersections::iterator hitr = intersections.begin();
hitr != intersections.end();
++hitr)
{
if (hitr->_geode.valid() && !hitr->_geode->getName().empty()) return hitr->_geode->getName();
osg::Node* node = hitr->nodePath.empty() ? 0 : hitr->nodePath.back();
if (node && !node->getName().empty()) return node->getName();
}
}
#else
osg::notify(osg::NOTICE)<<"Picking not implemented yet "<<x<<", "<<y<<std::endl;
#endif
return "";
}
@@ -416,9 +414,6 @@ int main( int argc, char **argv )
// add model to viewer.
viewer.setSceneData( root );
// create the windows and run the threads.
viewer.realize();
osg::Matrix lookAt;
lookAt.makeLookAt(osg::Vec3(0.0f, -4.0f, 0.0f), centerScope, osg::Vec3(0.0f, 0.0f, 1.0f));

132
examples/osgmovie/osgmovie.cpp
View File

@@ -116,88 +116,84 @@ bool MovieEventHandler::handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIAction
case(osgGA::GUIEventAdapter::PUSH):
case(osgGA::GUIEventAdapter::RELEASE):
{
#if 0
osgProducer::Viewer* viewer = dynamic_cast<osgProducer::Viewer*>(&aa);
osgUtil::IntersectVisitor::HitList hlist;
if (viewer->computeIntersections(ea.getX(),ea.getY(), nv->getNodePath().back(), hlist))
osgViewer::View* view = dynamic_cast<osgViewer::View*>(&aa);
osg::notify(osg::NOTICE)<<"osgmovie - view = "<<view<<std::endl;
osgUtil::LineSegmentIntersector::Intersections intersections;
if (view && view->computeIntersections(ea.getX(), ea.getY(), nv->getNodePath().back(), intersections))
{
if (!hlist.empty())
#if 1
osg::notify(osg::NOTICE)<<"osgmovie - Vertex interpolation not implemented yet"<<std::endl;
#else
// use the nearest intersection
const osgUtil::LineSegmentIntersector::Intersection& intersection = *(intersections.begin());
osg::Drawable* drawable = intersection.drawable.get();
osg::Geometry* geometry = drawable ? drawable->asGeometry() : 0;
osg::Vec3Array* vertices = geometry ? dynamic_cast<osg::Vec3Array*>(geometry->getVertexArray()) : 0;
if (vertices)
{
// use the nearest intersection
osgUtil::Hit& hit = hlist.front();
osg::Drawable* drawable = hit.getDrawable();
osg::Geometry* geometry = drawable ? drawable->asGeometry() : 0;
osg::Vec3Array* vertices = geometry ? dynamic_cast<osg::Vec3Array*>(geometry->getVertexArray()) : 0;
// get the vertex indices.
const osgUtil::LineSegmentIntersector::Intersection::IndexList& vil = intersection.indexList;
if (vertices)
if (vil.size()==3)
{
// get the vertex indices.
const osgUtil::Hit::VecIndexList& vil = hit.getVecIndexList();
int i1 = vil[0];
int i2 = vil[1];
int i3 = vil[2];
osg::Vec3 v1 = (*vertices)[i1];
osg::Vec3 v2 = (*vertices)[i2];
osg::Vec3 v3 = (*vertices)[i3];
osg::Vec3 v = intersection.localIntersectionPoint;
if (vil.size()==3)
osg::Vec3 p1 = intersection.getLocalLineSegment()->start();
osg::Vec3 p2 = intersection.getLocalLineSegment()->end();
osg::Vec3 p12 = p1-p2;
osg::Vec3 v13 = v1-v3;
osg::Vec3 v23 = v2-v3;
osg::Vec3 p1v3 = p1-v3;
osg::Matrix matrix(p12.x(), v13.x(), v23.x(), 0.0,
p12.y(), v13.y(), v23.y(), 0.0,
p12.z(), v13.z(), v23.z(), 0.0,
0.0, 0.0, 0.0, 1.0);
osg::Matrix inverse;
inverse.invert(matrix);
osg::Vec3 ratio = inverse*p1v3;
// extract the baricentric coordinates.
float r1 = ratio.y();
float r2 = ratio.z();
float r3 = 1.0f-r1-r2;
osg::Array* texcoords = (geometry->getNumTexCoordArrays()>0) ? geometry->getTexCoordArray(0) : 0;
osg::Vec2Array* texcoords_Vec2Array = dynamic_cast<osg::Vec2Array*>(texcoords);
if (texcoords_Vec2Array)
{
// we have tex coord array so now we can compute the final tex coord at the point of intersection.
osg::Vec2 tc1 = (*texcoords_Vec2Array)[i1];
osg::Vec2 tc2 = (*texcoords_Vec2Array)[i2];
osg::Vec2 tc3 = (*texcoords_Vec2Array)[i3];
osg::Vec2 tc = tc1*r1 + tc2*r2 + tc3*r3;
int i1 = vil[0];
int i2 = vil[1];
int i3 = vil[2];
osg::Vec3 v1 = (*vertices)[i1];
osg::Vec3 v2 = (*vertices)[i2];
osg::Vec3 v3 = (*vertices)[i3];
osg::Vec3 v = hit.getLocalIntersectPoint();
osg::Vec3 p1 = hit.getLocalLineSegment()->start();
osg::Vec3 p2 = hit.getLocalLineSegment()->end();
osg::Vec3 p12 = p1-p2;
osg::Vec3 v13 = v1-v3;
osg::Vec3 v23 = v2-v3;
osg::Vec3 p1v3 = p1-v3;
osg::Matrix matrix(p12.x(), v13.x(), v23.x(), 0.0,
p12.y(), v13.y(), v23.y(), 0.0,
p12.z(), v13.z(), v23.z(), 0.0,
0.0, 0.0, 0.0, 1.0);
osg::Matrix inverse;
inverse.invert(matrix);
osg::Vec3 ratio = inverse*p1v3;
osg::notify(osg::NOTICE)<<"We hit tex coords "<<tc<<std::endl;
// extract the baricentric coordinates.
float r1 = ratio.y();
float r2 = ratio.z();
float r3 = 1.0f-r1-r2;
osg::Array* texcoords = (geometry->getNumTexCoordArrays()>0) ? geometry->getTexCoordArray(0) : 0;
osg::Vec2Array* texcoords_Vec2Array = dynamic_cast<osg::Vec2Array*>(texcoords);
if (texcoords_Vec2Array)
{
// we have tex coord array so now we can compute the final tex coord at the point of intersection.
osg::Vec2 tc1 = (*texcoords_Vec2Array)[i1];
osg::Vec2 tc2 = (*texcoords_Vec2Array)[i2];
osg::Vec2 tc3 = (*texcoords_Vec2Array)[i3];
osg::Vec2 tc = tc1*r1 + tc2*r2 + tc3*r3;
osg::notify(osg::NOTICE)<<"We hit tex coords "<<tc<<std::endl;
}
}
else
{
osg::notify(osg::NOTICE)<<"Hit but insufficient indices to work with";
}
}
}
else
{
osg::notify(osg::NOTICE)<<"Intersection has insufficient indices to work with";
}
}
#endif
}
else
{
osg::notify(osg::NOTICE)<<"No hit"<<std::endl;
osg::notify(osg::NOTICE)<<"No intersection"<<std::endl;
}
#else
osg::notify(osg::NOTICE)<<"Need to implement picking."<<std::endl;
#endif
break;
}
case(osgGA::GUIEventAdapter::KEYDOWN):

27
examples/osgoccluder/osgoccluder.cpp
View File

@@ -45,29 +45,22 @@ class OccluderEventHandler : public osgGA::GUIEventHandler
osg::ref_ptr<osg::ConvexPlanarOccluder> _convexPlanarOccluder;
};
bool OccluderEventHandler::handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter&)
bool OccluderEventHandler::handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& aa)
{
#if 0
switch(ea.getEventType())
{
case(osgGA::GUIEventAdapter::KEYDOWN):
{
if (ea.getKey()=='a')
{
float x = ea.getXnormalized();
float y = ea.getYnormalized();
osgUtil::IntersectVisitor::HitList hitList;
if (!_viewer->computeIntersections(x,y,hitList))
osgViewer::View* view = dynamic_cast<osgViewer::View*>(&aa);
osgUtil::LineSegmentIntersector::Intersections intersections;
if (view && view->computeIntersections(ea.getX(), ea.getY(), intersections))
{
return true;
}
if (!hitList.empty())
{
osgUtil::Hit& hit = hitList.front();
addPoint(hit.getWorldIntersectPoint());
const osgUtil::LineSegmentIntersector::Intersection& hit = *(intersections.begin());
if (hit.matrix.valid()) addPoint(hit.localIntersectionPoint * (*hit.matrix));
else addPoint(hit.localIntersectionPoint);
}
return true;
@@ -97,10 +90,6 @@ bool OccluderEventHandler::handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIAct
default:
return false;
}
#else
osg::notify(osg::NOTICE)<<"Computre intersections not implemented yet."<<std::endl;
return false;
#endif
}
void OccluderEventHandler::addPoint(const osg::Vec3& pos)

23
include/osgViewer/View
View File

@@ -15,11 +15,14 @@
#define OSGVIEWER_VIEW 1
#include <osg/View>
#include <osgUtil/PolytopeIntersector>
#include <osgUtil/LineSegmentIntersector>
#include <osgUtil/SceneView>
#include <osgGA/MatrixManipulator>
#include <osgViewer/Scene>
#include <osgUtil/SceneView>
namespace osgViewer {
/** View holds a single view on a scene, this view may be composed of one or more slave cameras.*/
@@ -53,6 +56,22 @@ class OSGVIEWER_EXPORT View : public osg::View, public osgGA::GUIActionAdapter
/** Convinience method for a single Camara associated with a single full screen GraphicsWindow.*/
void setUpViewOnSingleScreen(unsigned int screenNum=0);
/** Compute intersections between a ray through the specified master cameras window/eye coords and a specified node.
* Note, when a master cameras has slaves and no viewport itself its coordinate frame will be in clip space i.e. -1,-1 to 1,1,
* while if its has a viewport the coordintates will be relative to its viewport dimensions.
* Mouse events handled by the view will automatically be attached into the master camera window/clip coords so can be passed
* directly on to the computeIntersections method. */
bool computeIntersections(float x,float y, osgUtil::LineSegmentIntersector::Intersections& intersections,osg::Node::NodeMask traversalMask = 0xffffffff);
/** Compute intersections between a ray through the specified master cameras window/eye coords and a specified node.
* Note, when a master cameras has slaves and no viewport itself its coordinate frame will be in clip space i.e. -1,-1 to 1,1,
* while if its has a viewport the coordintates will be relative to its viewport dimensions.
* Mouse events handled by the view will automatically be attached into the master camera window/clip coords so can be passed
* directly on to the computeIntersections method. */
bool computeIntersections(float x,float y, osg::Node* node, osgUtil::LineSegmentIntersector::Intersections& intersections,osg::Node::NodeMask traversalMask = 0xffffffff);
virtual void requestRedraw();
virtual void requestContinuousUpdate(bool needed=true);
virtual void requestWarpPointer(float x,float y);

2
src/osgViewer/CompositeViewer.cpp
View File

@@ -30,7 +30,7 @@ void CompositeViewer::init()
void CompositeViewer::addView(osgViewer::View* view)
{
osg::notify(osg::NOTICE)<<"CompositeViewer::addView(View*) not implemented yet."<<std::endl;
osg::notify(osg::NOTICE)<<"CompositeViewer::addView(View*) not implemented yet. view="<<view<<std::endl;
}
void CompositeViewer::frame()

46
src/osgViewer/View.cpp
View File

@@ -17,6 +17,8 @@
#include <osgUtil/SceneView>
#include <osg/io_utils>
#include <osgUtil/IntersectionVisitor>
using namespace osgViewer;
View::View()
@@ -85,11 +87,7 @@ void View::setUpViewAcrossAllScreens()
traits->y = 0;
traits->width = width;
traits->height = height;
#if 1
traits->windowDecoration = false;
#else
traits->windowDecoration = true;
#endif
traits->doubleBuffer = true;
traits->sharedContext = 0;
@@ -223,7 +221,7 @@ void View::setUpViewOnSingleScreen(unsigned int screenNum)
osg::GraphicsContext::WindowingSystemInterface* wsi = osg::GraphicsContext::getWindowingSystemInterface();
if (!wsi)
{
osg::notify(osg::NOTICE)<<"View::setUpViewAcrossAllScreens() : Error, no WindowSystemInterface available, cannot create windows."<<std::endl;
osg::notify(osg::NOTICE)<<"View::setUpViewOnSingleScreen() : Error, no WindowSystemInterface available, cannot create windows."<<std::endl;
return;
}
@@ -235,11 +233,7 @@ void View::setUpViewOnSingleScreen(unsigned int screenNum)
traits->y = 0;
traits->width = width;
traits->height = height;
#if 1
traits->windowDecoration = false;
#else
traits->windowDecoration = true;
#endif
traits->doubleBuffer = true;
traits->sharedContext = 0;
@@ -250,7 +244,7 @@ void View::setUpViewOnSingleScreen(unsigned int screenNum)
osgViewer::GraphicsWindow* gw = dynamic_cast<osgViewer::GraphicsWindow*>(gc.get());
if (gw)
{
osg::notify(osg::INFO)<<" GraphicsWindow has been created successfully."<<std::endl;
osg::notify(osg::INFO)<<"View::setUpViewOnSingleScreen - GraphicsWindow has been created successfully."<<std::endl;
gw->getEventQueue()->getCurrentEventState()->setWindowRectangle(0, 0, width, height );
}
else
@@ -391,3 +385,35 @@ void View::requestWarpPointer(float x,float y)
}
bool View::computeIntersections(float x,float y, osgUtil::LineSegmentIntersector::Intersections& intersections,osg::Node::NodeMask traversalMask)
{
if (!_camera.valid()) return false;
osgUtil::LineSegmentIntersector::CoordinateFrame cf = _camera->getViewport() ? osgUtil::Intersector::WINDOW : osgUtil::Intersector::PROJECTION;
osgUtil::LineSegmentIntersector* picker = new osgUtil::LineSegmentIntersector(cf, x, y);
osgUtil::IntersectionVisitor iv(picker);
iv.setTraversalMask(traversalMask);
_camera->accept(iv);
if (picker->containsIntersections())
{
intersections = picker->getIntersections();
return true;
}
else
{
intersections.clear();
return false;
}
}
bool View::computeIntersections(float x,float y, osg::Node* node, osgUtil::LineSegmentIntersector::Intersections& intersections,osg::Node::NodeMask traversalMask)
{
if (!_camera.valid()) return false;
osg::notify(osg::NOTICE)<<"View::computeIntersections(x,y,node,intersections) not implemented"<<std::endl;
return false;
}

2
src/osgViewer/Viewer.cpp
View File

@@ -490,6 +490,8 @@ void Viewer::realize()
if (contexts.empty())
{
osg::notify(osg::INFO)<<"Viewer::realize() - No valid contexts found, setting up view across all screens."<<std::endl;
// no windows are already set up so set up a default view
setUpViewAcrossAllScreens();
getContexts(contexts);